A point is in the first quadrant. Which of the following...
A point is in the first quadrant. Which of the following could be the coordinates of the point? A. (1,1) B. (-1,1) C. (1,-1) D. (-1,-1) 相关知识点: 试题来源: 解析 A。在第一象限的点横坐标和纵坐标都是正数。B 选项在第二象限;C 选项在第四象限;D 选项在第三象限。